BUG: Fix multiple Boost lib dependency

Modules/ThirdParty/Boost/otb-module-init.cmake

 # Required
 message(STATUS "Looking for required Boost headers")
 find_package ( Boost
-  1.35.0
+  1.35.0 
   REQUIRED
   )
 
+# Mandatory components
+# - date_time -> ossim plugins
+set(OTB_Boost_MANDATORY_COMPONENTS date_time)
 # Optional components
 # Boost (OPTIONAL_COMPONENTS does not work with Boost find_package)
 # unit_test_framework component is used only in GdalAdapters module
 if (BUILD_TESTING)
   set(OTB_Boost_OPTIONAL_COMPONENTS unit_test_framework)
-  message(STATUS "Looking for optional Boost components : ${OTB_Boost_OPTIONAL_COMPONENTS}")
-  find_package ( Boost
-    QUIET
-    1.35.0
-    COMPONENTS ${OTB_Boost_OPTIONAL_COMPONENTS}
-    )
 endif()
+
+#Quiet find package to avoid message "Could not find boost" because unit_testing_framework is not installed
+message(STATUS "Looking for optional Boost components : ${OTB_Boost_OPTIONAL_COMPONENTS}")
+find_package ( Boost
+  QUIET
+  1.35.0
+  COMPONENTS ${OTB_Boost_MANDATORY_COMPONENTS} ${OTB_Boost_OPTIONAL_COMPONENTS}
+  )

SuperBuild/CMake/External_boost.cmake

@@ -8,15 +8,25 @@ if(NOT __EXTERNAL_BOOST__)
 set(__EXTERNAL_BOOST__ 1)
 
 if(USE_SYSTEM_BOOST)
+  # Required
+  find_package ( Boost
+    1.35.0
+    )
+  # Optional components
+  find_package ( Boost
+    1.35.0
+    COMPONENTS unit_test_framework date_time
+    )
+  
   message(STATUS "  Using Boost system version")
 else()
   SETUP_SUPERBUILD(PROJECT BOOST)
-
+  
   message(STATUS "  Using Boost superbuild version")
 
   option(SUPERBUILD_BOOST_HEADER_ONLY "Only use Boost headers" ON)
   mark_as_advanced(SUPERBUILD_BOOST_HEADER_ONLY)
-
+  
   if(UNIX)
     if(SUPERBUILD_BOOST_HEADER_ONLY)
       ExternalProject_Add(BOOST
@@ -30,8 +40,8 @@ else()
         -DCMAKE_INSTALL_PREFIX:STRING=${SB_INSTALL_PREFIX}
         -DCMAKE_BUILD_TYPE:STRING=Release
         -DBUILD_SHARED_LIBS:BOOL=ON
-        PATCH_COMMAND ${CMAKE_COMMAND} -E copy
-        ${CMAKE_SOURCE_DIR}/patches/BOOST/CMakeLists.txt
+        PATCH_COMMAND ${CMAKE_COMMAND} -E copy 
+        ${CMAKE_SOURCE_DIR}/patches/BOOST/CMakeLists.txt 
         ${BOOST_SB_SRC}
       )
     else()
@@ -52,7 +62,7 @@ else()
           ${CMAKE_SOURCE_DIR}/patches/BOOST/1.54.0
           ${BOOST_SB_SRC}
       )
-
+      
       ExternalProject_Add_Step(BOOST copy_source
         COMMAND ${CMAKE_COMMAND} -E copy_directory
           ${BOOST_SB_SRC} ${BOOST_SB_BUILD_DIR}
@@ -60,25 +70,25 @@ else()
         DEPENDERS configure
       )
     endif()
-
+    
     message(STATUS "  Using Boost SuperBuild version")
-
+    
   else(MSVC)
     #TODO: find hash for archives properly
     set(BOOST_HEADERS_URL_HASH 1605dc6085cb2dc778ef5ab6c0e59083)
     set(BOOST_GRAPH_URL_HASH c246516ca84a3c79ae8a0b22fceb0344)
     set(BOOST_REGEX_URL_HASH a3bfc2dc9a3ebe3c050518ecb29d6f8b)
     set(BOOST_UTF_URL_HASH 75971963a74c76d32e01974a8e48be11)
-
+    
     if(MSVC10)
         set(BOOST_HEADERS_URL_HASH 1605dc6085cb2dc778ef5ab6c0e59083)
         set(BOOST_GRAPH_URL_HASH c246516ca84a3c79ae8a0b22fceb0344)
         set(BOOST_REGEX_URL_HASH a3bfc2dc9a3ebe3c050518ecb29d6f8b)
         set(BOOST_UTF_URL_HASH 75971963a74c76d32e01974a8e48be11)
     else(MSVC80)
-
+ 
     else(CMAKE_COMPILER_2005)
-
+   
     endif()
 
     set(BOOST_HEADERS_URL "http://sourceforge.net/projects/boost/files/boost-binaries/1.50.0/boost_1_50_headers.zip/download")
@@ -100,7 +110,7 @@ else()
         ExternalProject_Add(BOOST_${BOOSTLIB}
             PREFIX BOOST/_${BOOSTLIB}
             URL ${BOOST_${BOOSTLIB}_URL}
-            URL_MD5 ${BOOST_${BOOSTLIB}_URL_HASH}
+            URL_MD5 ${BOOST_${BOOSTLIB}_URL_HASH} 
             SOURCE_DIR ${BOOST_SB_SRC}/lib
             DEPENDS BOOST_HEADERS
             CONFIGURE_COMMAND ""
@@ -109,7 +119,7 @@ else()
         )
     list(APPEND BOOSTLIBS BOOST_${BOOSTLIB})
     endforeach()
-
+    
     ExternalProject_Add(BOOST
       PREFIX BOOST
       DOWNLOAD_COMMAND ""
@@ -121,12 +131,12 @@ else()
     )
 
     message(STATUS "  Using Boost SuperBuild version (prebuilt binaries)")
-
+    
   endif() #end else MSVC
-
+  
   set(_SB_Boost_INCLUDE_DIR ${SB_INSTALL_PREFIX}/include)
   set(_SB_Boost_LIBRARY_DIR ${SB_INSTALL_PREFIX}/lib)
-
-
+  
+  
 endif()
 endif()